[R-390] Troubles.

[Dave Mayfield W9WRL]

I have an R-390a that has not been turned on in a year or two. Yesterday 
I turned it on, and after about 30 seconds the fuse blew, I noticed when 
it was warming up that there was no audio hiss, or any other normal 
sounds. I did also notice that just a split second before the fuse let 
loose, that the slight hum from the power supply got louder then the 
fuse went.

I replaced the fuse and same thing happened.

I then pulled the power supply and replaced it with a know good one, 
same thing fuse popped after about 30 seconds.

I checked all tubes, and found a few weak ones, I was hoping to find one 
that was shorted after warm up.

I then unplugged the IF deck, replaced the fuse and turned it on, same 
thing 30 seconds and pop.

Any ideas, seems like a cap somewhere to me, but I'm no expert, any 
ideas????

-- 
  73 Dave W9WRL
www.w9wrl.com/w9wrl